Goal: Be able to deserialize documents where

• field is missing
• field type is a child of `Iterable`

to ease changes in models without having to run scripts or write custom codecs.

Now, this won't work,
but we could expect that `metadata` and `aliases` are considered as empty, or at least having a setting in the client to enable it.

{
  "name": "John Doe"
}

case class Person(name: String, aliases: Set[String], metadata: Map[String, String])